/*
package com.ljx.service;

import com.ljx.dao.StockDao;
import com.ljx.entity.Stock;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

*/
/**
 * @author LJX
 * @Description: TODO
 * @Date: 2022/12/8 15:12
 * @Version 1.0
 *//*

@Service
public class StockServiceImpl {
	@Resource
	private StockDao stockDao;

	public String decrement(Integer productid){
		// 1.查找指定商品的库存
		Stock stock = stockDao.selectById(productid);
		// 2.判断库存数是否大于0
		if(stock.getStock() > 0){
			// 3.减库存(实体类减去库存数据库也要减去)
			stock.setStock(stock.getStock() - 1);
			stockDao.updateById(stock);
			System.out.println("商品编号为:" + productid + "的商品库存剩余:" + stock.getStock() + "个");
			return "商品编号为:" + productid + "的商品库存剩余:" + stock.getStock() + "个";
		} else {
			System.out.println("商品编号为:" + productid + "的商品库存不足。");
			return "商品编号为:" + productid + "的商品库存不足。";
		}

	}

}
*/
